Liquid-Vapor Equilibria in High Vacuum

Cooperative Diffusion of Concentrated Polymer Solutions: A Static and Dynamic Light Scattering Study of Polystyrene in DOP

“…For an accurate determination of the osmotic compressibility from the scattered light intensity, we need to take into account the temperature and concentration dependence of the density and refractive index of the solutions. The densities (ρ) of DOP and polystyrene are 1.05 and 0.975 g/mL, respectively, at 20 °C with ∂ρ/∂ T equal to −7.55 × 10 -4 and −6.05 × 10 -4 g/mL -1 K -1 for T > T g . The effect of nonideal mixing can be neglected.…”

Distillation

“…Willingham and coworkers {153) have compared various columns and packings through use of the A factor. The evaluation of vacuum columns has progressed to the extent that several additional binary test mixtures have been developed (47,106,151).…”

High Temperature Distillation

“…The use of intermittent or continuous take-off is the subject of the article by Oldroyd and Goldblatt (46)• In some cases of high efficiency columns it appears that intermittent take-off may result in sharper fractionation than the more common continuous operation.…”

“…This mixture is satisfactory for columns having up to SO theoretical plates. Perry and Fuguitt (46) present data on the systems di-2-ethylhexyl phthaIate-di-2ethylhexyl sebacate suitable for 5 theoretical plates and di-2ethylhexyl sebacate-di-n-octyl phthalate suitable for 30 plates at 0.10 mm. pressure.…”